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US 4,066,983 AGranted
Voltage controlled Clapp oscillator having output isolated from tuned circuit
AssigneeRaytheon Company
InventorsZvi Gallani, Joseph A. Sullivan
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Abstract
A voltage controlled oscillator arrangement having improved characteristics is shown to include a Clapp type oscillator utilizing a transistor as the active element, the electrodes of such transistor being connected to an electronically tunable resonant circuit and to a load in such a fashion as to effectively separate the two.
Claims2
A voltage tunable oscillator comprising:
- a. a transistor having first, second and third electrodes, said first electrode being grounded;
- b. means connected to said second electrode and comprising an inductor, a capacitor and a varactor to form a resonant circuit across the interelectrode capacitance between said first and said second electrodes;
- c. a feedback circuit comprising the interelectrode capacitance between said first and third electrodes;
- d. an output circuit connected to said third electrode and including a variable capacitor for matching the impedance of said output circuit;
- and
- e. means for biasing said second and third electrodes and for controlling the capacitance of the varactor thereby to control the frequency of operation.
3 more elements
Dependencies are inferred from the claim text.